{"id":7383,"date":"2022-04-22T14:10:49","date_gmt":"2022-04-22T21:10:49","guid":{"rendered":"https:\/\/www.xh86.me\/?p=7383"},"modified":"2022-04-22T14:10:49","modified_gmt":"2022-04-22T21:10:49","slug":"is-is-%e5%b8%b8%e7%94%a8%e5%90%8d%e8%af%8d","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=7383","title":{"rendered":"IS-IS \u5e38\u7528\u540d\u8bcd"},"content":{"rendered":"
\n

OSI \u5b9a\u4e49\u4e86\u4e03\u5c42\u6a21\u578b\uff0c\u90a3\u4e3a\u5565\u53eb OSI \u53c2\u8003<\/strong>\u6a21\u578b\uff1f\u56e0\u4e3a OSI \u4e0d\u4ec5\u5b9a\u4e49\u4e86\u4e03\u5c42\u6a21\u578b\uff0c\u8fd8\u5b9a\u4e49\u4e86\u5404\u5c42\u7684\u7f51\u7edc\u534f\u8bae\uff0c\u6bd4\u5982\uff1aCLNS \u3001CONP \u3001IS-IS \u7b49\u7b49\u3002\u4f46\u662f\u5f88\u591a\u534f\u8bae\uff0c\u51e0\u5e74\u65f6\u95f4\u90fd\u65e0\u6cd5\u5b9a\u7a3f\uff0c\u5b9a\u7a3f\u7684\u90e8\u5206\u4e5f\u5f88\u590d\u6742\uff0c\u5b9e\u73b0\u6210\u672c\u8fc7\u9ad8\u3002<\/p>\n

\n

<\/div><\/span><\/p>\n

\u800c TCP\/IP \u534f\u8bae\u65cf\u662f\u5148\u6709\u7f51\u7edc\u534f\u8bae\uff0c\u518d\u53c2\u8003 OSI \u7684\u7f51\u7edc\u5206\u5c42\u6a21\u578b\uff0c\u5efa\u7acb TCP\/IP \u7f51\u7edc\u6a21\u578b\u3002\u867d\u7136\u4e0d\u5982 OSI \u5b8c\u5584\uff0c\u4f46\u662f TCP \u3001IP \u7b49\u534f\u8bae\u53ef\u76f4\u63a5\u6295\u5165\u4f7f\u7528\u3002<\/p>\n

<\/div><\/span><\/p>\n

\u6700\u540e\uff0cOSI \u5927\u90e8\u5206\u9879\u76ee\u4e0d\u4e86\u4e86\u4e4b\uff0c\u51e0\u4e4e\u53ea\u5269\u4e0b\u53c2\u8003\u6a21\u578b\u3002<\/p>\n

IS-IS<\/span><\/h3>\n

\u5176\u4e2d IS-IS \u662f\u4e3a\u6570\u4e0d\u591a\u7684\u3001\u73b0\u7f51\u8fd8\u5728\u4f7f\u7528\u7684 OSI \u7f51\u7edc\u534f\u8bae\u3002IS-IS<\/strong> \uff0c\u5373 Intermediate System to Intermediate System \uff0c\u4e2d\u95f4\u7cfb\u7edf\u5230\u4e2d\u95f4\u7cfb\u7edf\uff0c\u662f\u4e00\u79cd\u94fe\u8def\u72b6\u6001\u8def\u7531\u534f\u8bae\u3002\u4e0e OSPF \u5f88\u50cf\uff0cIS-IS \u901a\u8fc7 Hello \u62a5\u6587\u53d1\u73b0\u5bf9\u65b9\uff0c\u5efa\u7acb\u90bb\u5c45\u5173\u7cfb\uff0c\u4ea4\u4e92 LSP \uff0cLSP \u4f1a\u5b58\u50a8\u5728\u81ea\u5df1\u7684 LSDB \u4e2d\uff0c\u91c7\u7528 SPF \u7b97\u6cd5\u8fdb\u884c\u8ba1\u7b97\uff0c\u6700\u540e\u5f97\u5230 IS-IS \u8def\u7531\u3002<\/p>\n

<\/div><\/span><\/p>\n

IS-IS \u662f\u4e3a CLNP<\/strong>\uff08 ConnectionLess Network Protocol \uff0c\u65e0\u8fde\u63a5\u7f51\u7edc\u534f\u8bae\uff09\u7684\u52a8\u6001\u8def\u7531\u534f\u8bae\uff0c\u53ef\u4ee5\u628a OSI \u4e2d\u7684 CLNP \u7406\u89e3\u4e3a TCP\/IP \u7684 IP \u534f\u8bae\uff0c\u4e24\u4e2a\u534f\u8bae\u7684\u529f\u80fd\u975e\u5e38\u76f8\u4f3c\u3002IS-IS \u662f\u65e0\u6cd5\u8fd0\u884c\u5728 TCP\/IP \u73af\u5883\u4e2d\u7684\uff0c\u540e\u6765\u5bf9 IS-IS \u8fdb\u884c\u4e86\u6269\u5c55\uff0c\u8ba9\u5b83\u53ef\u4ee5\u540c\u65f6\u652f\u6301 IP \u8def\u7531\uff0c\u8fd9\u79cd IS-IS \u53eb\u505a\u96c6\u6210 IS-IS<\/strong>\uff08 Integrated IS-IS \uff09\u3002<\/p>\n

\u5e38\u7528\u540d\u8bcd<\/span><\/h3>\n

ISO<\/strong> \uff1a\u56fd\u9645\u6807\u51c6\u5316\u7ec4\u7ec7\uff0c\u5373\u5728\u56fd\u9645\u4e0a\u4fc3\u8fdb\u5404\u9886\u57df\u7684\u6807\u51c6\u5316\u5b9e\u73b0\uff0c\u6bd4\u5982 ISO9000 \u8d28\u91cf\u4f53\u7cfb\u3001OSI \u53c2\u8003\u6a21\u578b\u3002<\/p>\n

OSI \u6a21\u578b\u6709\u4e24\u79cd\u901a\u4fe1\u7c7b\u578b\uff1aCONS<\/strong>\uff08\u9762\u5411\u8fde\u63a5\u7684\u7f51\u7edc\u670d\u52a1\uff09\u548c CLNS<\/strong>\uff08\u65e0\u8fde\u63a5\u7f51\u7edc\u670d\u52a1\uff09\u3002<\/p>\n

CONS<\/strong> \uff1a\u9762\u5411\u8fde\u63a5\u7684\u7f51\u7edc\u670d\u52a1\u3002CONP \u8fde\u63a5\u7684\u7f51\u7edc\u534f\u8bae\uff0c\u7528\u6765\u652f\u6301 CONS \u670d\u52a1\u3002\u4f46\u73b0\u5728 CLNS \u5df2\u7ecf\u53d6\u4ee3\u4e86 CONS \u670d\u52a1\u3002<\/p>\n

CLNS<\/strong> \uff1a\u65e0\u8fde\u63a5\u7684\u7f51\u7edc\u670d\u52a1\u3002\u7531 CLNP \u534f\u8bae\u652f\u6301\u3002<\/p>\n

CLNP<\/strong> \uff1a\u65e0\u8fde\u63a5\u7f51\u7edc\u534f\u8bae\uff0c\u7c7b\u4f3c IP \u534f\u8bae\uff0c\u662f OSI \u6a21\u5f0f\u4e0b\u7684 CLNS \u7684\u7f51\u7edc\u534f\u8bae\u3002\u6709\u65f6\u4e5f\u53eb CLNS \u534f\u8bae\u3002IS-IS \u3001ES-IS \u3001CLNP \u90fd\u662f\u7f51\u7edc\u5c42\u534f\u8bae\uff0c\u76f4\u63a5\u5c01\u88c5\u5728\u6570\u636e\u94fe\u8def\u5c42\u5e27\u5185\u3002\u800c TCP\/IP \u7684 OSPF \u62a5\u6587\u662f\u5c01\u88c5\u5728 IP \u62a5\u6587\u91cc\u7684\u3002<\/p>\n

<\/div><\/span><\/p>\n

IS<\/strong> \uff1a\u4e2d\u95f4\u7cfb\u7edf\u3002IS-IS \u534f\u8bae\u4e2d\uff0c\u8def\u7531\u5668\u5c31\u662f\u4e2d\u95f4\u7cfb\u7edf\u3002<\/p>\n

ES<\/strong> \uff1a\u7ec8\u7aef\u7cfb\u7edf\u3002IS-IS \u534f\u8bae\u4e2d\uff0c\u6bd4\u5982\u4e3b\u673a\u3001\u670d\u52a1\u5668\u7b49<\/p>\n

IS-IS<\/strong> \uff1a\u4e2d\u95f4\u7cfb\u7edf\u5230\u4e2d\u95f4\u7cfb\u7edf\uff0c\u662f OSI \u534f\u8bae\u4e2d\u7684\u52a8\u6001\u94fe\u8def\u534f\u8bae\uff0c\u5728 CLNS \u73af\u5883\u4e2d\uff0cIS \u4e4b\u95f4\u52a8\u6001\u7684\u4ea4\u6362\u8def\u7531\u4fe1\u606f\u7684\u534f\u8bae,\u540e\u6765\u6269\u5c55\u5230\u540c\u65f6\u652f\u6301 TCP\/IP \u534f\u8bae\u3002OSPF \u662f TCP\/IP \u4e0b\u7684\u52a8\u6001\u94fe\u8def\u534f\u8bae\u3002<\/p>\n

\u96c6\u6210 IS-IS<\/strong> \uff1aIS-IS \u4ec5\u652f\u6301 CLNS \u7f51\u7edc\u73af\u5883\uff0c\u4e0d\u652f\u6301 IP \u7f51\u7edc\u73af\u5883\u3002\u540e\u6765 IETF \u5bf9 IS-IS \u8fdb\u884c\u4e86\u4fee\u6539\u548c\u6269\u5c55\uff0c\u53eb\u505a\u96c6\u6210 IS-IS\uff08 Integrated IS-IS \uff09\u3002\u96c6\u6210 IS-IS \u80fd\u540c\u65f6\u5728 TCP\/IP \u548c OSI \u7f51\u7edc\u4e2d\uff0c\u4e3a\u63d0\u4f9b\u52a8\u6001\u7684\u8def\u7531\u4fe1\u606f\u4ea4\u6362\u3002\u96c6\u6210 IS-IS \u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u7f51\u7edc\u5c42\u534f\u8bae\uff0c\u6bd4\u5982 IP \u548c CLNP \uff0c\u800c OSPF \u53ea\u652f\u6301 IP \u4e00\u79cd\u3002<\/p>\n

ES-IS<\/strong> \uff1a\u7ec8\u7aef\u7cfb\u7edf\u4e0e\u4e2d\u95f4\u7cfb\u7edf\u7684\u901a\u4fe1\u534f\u8bae\u3002\u4e0d\u5c5e\u4e8e\u8def\u7531\u534f\u8bae\u3002ES \u548c IS \u95f4\u5efa\u7acb\u90bb\u63a5\u5173\u7cfb\uff0c\u6570\u636e\u94fe\u8def\u5730\u5740\u5230\u7f51\u7edc\u5730\u5740\u7684\u6620\u5c04\u3002\u7c7b\u4f3c\u4e8e TCP\/IP \u534f\u8bae\u4e2d\u7684 MAC \u5730\u5740\u5230 IP \u5730\u5740\u7684\u6620\u5c04\u3002<\/p>\n

LSP<\/strong> \uff1a\u94fe\u8def\u72b6\u6001\u62a5\u6587\uff0c\u662f IS-IS \u7528\u4e8e\u63cf\u8ff0\u94fe\u8def\u72b6\u6001\u4fe1\u606f\uff0c\u7c7b\u4f3c OSPF \u7684 LSA \u3002IS \u628a\u7f51\u7edc\u4e2d\u7684 LSP \u641c\u96c6\u8d77\u6765\uff0c\u518d\u88c5\u8f7d\u5230\u81ea\u5df1\u7684 LSDB \u4e2d\uff0c\u7136\u540e\u57fa\u4e8e LSP \u8fdb\u884c\u8def\u7531\u8ba1\u7b97\u3002LSP \u5206\u4e3a\u4e24\u79cd\uff1aLevel-1 LSP \u548c Level-2 LSP \u3002<\/p>\n

PDU<\/strong> \uff1a\u6570\u636e\u5355\u5143\uff0cOSI \u7f51\u7edc\u5c42\u534f\u8bae\u62a5\u6587\uff0c\u7c7b\u4f3c\u4e8e TCP\/IP \u4e2d\u7684 IP \u62a5\u6587\u3002<\/p>\n

<\/div><\/span><\/p>\n

OSI \u5730\u5740<\/span><\/h3>\n

NSAP<\/h4>\n

\u5728 OSI \u534f\u8bae\u6808\u4e2d\uff0cNSAP<\/strong> \uff0c\u5373\u7f51\u7edc\u670d\u52a1\u5668\u63a5\u5165\u70b9\uff0c\u662f OSI \u7f51\u7edc\u5c42\u7684\u5730\u5740\uff0c\u5728 OSI \u534f\u8bae\u6808\u4e2d\u5b9a\u4f4d\u8d44\u6e90\u7684\u5730\u5740\u3002\u4e0d\u4f46\u5305\u542b\u6807\u8bc6\u8bbe\u5907\u7684\u5730\u5740\u4fe1\u606f\uff0c\u8fd8\u5305\u542b\u6807\u8bc6\u4e0a\u5c42\u534f\u8bae\u7c7b\u578b\u6216\u670d\u52a1\u7c7b\u578b\u7684\u5185\u5bb9\u3002\u7c7b\u4f3c\u4e8e TCP\/IP \u4e2d\u7684 IP \u5730\u5740\u548c TCP \u6216 UDP \u7aef\u53e3\u53f7\u7684\u7ec4\u5408\u3002<\/p>\n

NSAP \u5730\u5740<\/strong>\u7531 IDP<\/strong>\uff08\u521d\u59cb\u57df\u90e8\u5206\uff09\u548c DSP<\/strong>\uff08\u57df\u6307\u5b9a\u90e8\u5206\uff09\u7ec4\u6210\uff0cIDP \u548c DSP \u53c8\u8fdb\u4e00\u6b65\u5212\u5206\u3002IDP \u548c DSP \u957f\u5ea6\u53ef\u53d8\uff0c\u90a3\u4e48 NSAP \u5730\u5740\u7684\u603b\u957f\u5ea6\u4e5f\u4e0d\u56fa\u5b9a\uff0c\u6700\u77ed\u662f 8byte \uff0c\u6700\u957f\u662f 20byte \u3002<\/p>\n

<\/div><\/span><\/p>\n

AFI<\/strong> \uff1a\u957f\u5ea6\u662f 1 byte \uff0c\u8868\u793a\u5730\u5740\u7684\u5206\u914d\u673a\u6784\uff0c\u4e5f\u6307\u5b9a\u5730\u5740\u7684\u683c\u5f0f\u3002AFI \u503c\u662f 49 \u65f6\uff0c\u8868\u793a\u672c\u5730\u7ba1\u7406\uff0c\u5373\u79c1\u6709\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n

IDI<\/strong> \uff1a\u8868\u793a\u57df\uff0c\u957f\u5ea6\u53ef\u53d8\u3002<\/p>\n

High Order DSP<\/strong> \uff1a\u957f\u5ea6\u53ef\u53d8\uff0c\u5728\u4e00\u4e2a\u57df\u4e2d\u8fdb\u4e00\u6b65\u5212\u5206\u533a\u57df\u3002<\/p>\n

System ID<\/strong> \uff1a\u8868\u793a\u4e00\u4e2a\u533a\u57df\u5185\u7684\u67d0\u53f0\u8bbe\u5907\uff0c\u957f\u5ea6\u56fa\u5b9a 6 byte \uff0c\u901a\u5e38\u4f7f\u7528 16 \u8fdb\u5236\u8868\u793a\uff0c\u6bd4\u5982 1234.abcd.5678 \u3002\u540c\u65f6\uff0c\u8981\u4fdd\u8bc1\u57df\u5185\u8bbe\u5907\u7684 System ID \u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u8bbe\u5907\u7684 MAC \u5730\u5740\u521a\u597d\u662f 6 byte \uff0c\u4f7f\u7528\u8bbe\u5907\u7684 MAC \u5730\u5740\u4f5c\u4e3a System ID \u662f\u4e2a\u4e0d\u9519\u7684\u65b9\u6848\u3002<\/p>\n

SEL<\/strong> \uff1a\u957f\u5ea6\u662f 1 byte \uff0c\u8868\u793a\u4e0a\u5c42\u534f\u8bae\u7c7b\u578b\u6216\u670d\u52a1\u7c7b\u578b\u3002\u76f8\u5f53\u4e8e TCP\/IP \u4e2d\u7684\u7aef\u53e3\u3002<\/p>\n

<\/div><\/span><\/p>\n

IDP<\/strong> \uff1a\u76f8\u5f53\u4e8e IP \u5730\u5740\u7684\u7f51\u7edc\u53f7\uff0c\u7531 AFI \u548c IDI \u7ec4\u6210\u3002AFI \u8868\u793a\u5730\u5740\u5206\u914d\u673a\u6784\u548c\u5730\u5740\u683c\u5f0f\uff0cIDI \u8868\u793a\u57df\u3002<\/p>\n

DSP<\/strong> \uff1a\u76f8\u5f53\u4e8e IP \u5730\u5740\u7684\u5b50\u7f51\u53f7\u548c\u4e3b\u673a\u5730\u5740\u3002\u7531 High Order DSP \u3001System ID \u548c SEL \u7ec4\u6210\u3002High Order DSP \u7528\u6765\u5206\u9694\u533a\u57df\uff0cSystem ID \u7528\u6765\u533a\u5206\u4e3b\u673a\uff0cSEL \u7528\u6765\u8868\u793a\u670d\u52a1\u7c7b\u578b\u3002<\/p>\n

<\/div><\/span><\/p>\n

Area Address<\/strong> \uff1a\u957f\u5ea6\u53ef\u53d8\uff0c\u6700\u77ed\u662f 1 byte\u3002\u7531 IDP \u548c DSP \u7684 High Order DSP \u7ec4\u6210\uff0c\u65e2\u80fd\u591f\u8868\u793a\u8def\u7531\u57df\uff0c\u53c8\u80fd\u8868\u793a\u57df\u4e2d\u7684\u533a\u57df\uff0c\u53eb\u505a\u533a\u57df\u5730\u5740\uff0c\u76f8\u5f53\u4e8e OSPF \u4e2d\u7684\u533a\u57df\u7f16\u53f7\u3002<\/p>\n

NET<\/h4>\n

OSI \u534f\u8bae\u6808\u4e2d\uff0c\u8fd8\u6709\u4e00\u4e2a\u91cd\u8981\u7684\u5730\u5740\uff0c\u5b83\u5c31\u662f NET<\/strong> \uff0c\u5373\u7f51\u7edc\u5b9e\u4f53\u540d\u79f0\u3002SEL \u503c\u4e3a 0 \u7684 NASP \u5730\u5740\u5c31\u662f NET \uff0c\u5b83\u8868\u793a\u8bbe\u5907\u7684\u7f51\u7edc\u5730\u5740\u3002SEL \u4e3a 0 \uff0c\u5373\u672a\u6807\u8bc6\u4e0a\u5c42\u534f\u8bae\u7c7b\u578b\uff0c\u53ea\u7528\u4e8e\u8868\u793a\u8bbe\u5907\u672c\u8eab\u3002\u5373\u4f7f\u5728\u7eaf TCP\/IP \u73af\u5883\u4e2d\u90e8\u7f72 IS-IS \uff0c\u4e5f\u5fc5\u987b\u4e3a\u6bcf\u53f0\u8fd0\u884c IS-IS \u7684\u8bbe\u5907\u5206\u914d NET \uff0c\u5426\u5219\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002\u4e3a\u8bbe\u5907\u6307\u5b9a NET \u540e\uff0c\u8bbe\u5907\u5c31\u53ef\u4ee5\u89e3\u6790\u51fa\u533a\u57df ID<\/strong> \uff0c\u4ee5\u53ca\u8bbe\u5907\u7684\u7cfb\u7edf ID<\/strong> \u3002\u901a\u5e38\uff0c\u4e00\u4e2a\u8bbe\u5907\u6307\u5b9a\u4e00\u4e2a NET \uff0c\u5f53\u7136\uff0c\u4e5f\u652f\u6301\u6307\u5b9a\u591a\u4e2a NET \uff0c\u4f46\u662f\u7cfb\u7edf ID \u5fc5\u987b\u76f8\u540c\u3002\u7cfb\u7edf ID \u76f8\u5f53\u4e8e OSPF \u7684 Router-ID \u3002<\/p>\n

\n

NSAP \u662f\u4f7f\u7528\u4e00\u4e2a\u5730\u5740\u8868\u793a\u4e00\u53f0\u8def\u7531\u5668\uff0c\u800c IP \u662f\u8def\u7531\u5668\u7684\u6bcf\u4e2a\u7aef\u53e3\u90fd\u5206\u914d\u4e00\u4e2a IP \u5730\u5740\u3002<\/p>\n<\/blockquote>\n

\u5728 NET \u4e2d\uff0c\u533a\u57df ID \u7684\u957f\u5ea6\u53ef\u53d8\uff0c\u56e0\u6b64 NET \u7684\u957f\u5ea6\u4e0d\u56fa\u5b9a\u3002\u8bbe\u5907\u5982\u4f55\u8bc6\u522b\u51fa\u533a\u57df ID \u548c\u7cfb\u7edf ID \u5462\uff1f\u4ee5 49.0001.1234.abcd.5678.00 \u4e3a\u4f8b\u3002<\/p>\n

<\/div><\/span><\/p>\n

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